Calling a Graphics Routine

ILE RPG supports the use of the CALL or CALLP operation to call IBM i Graphics, which includes the Graphical Data Display Manager (GDDM®, a set of graphics primitives for drawing pictures), and Presentation Graphics Routines (a set of business charting routines). Factor 2 must contain the literal or named constant 'GDDM' (not a variable). Use the PLIST and PARM operations to pass the following parameters:

The name of the graphics routine you want to run.
The appropriate parameters for the specified graphics routine. These parameters must be of the data type required by the graphics routine and cannot have a float format.

The procedure that processes the CALL does not implicitly start or end IBM i graphics routines.

For more information on IBM i Graphics, graphics routines and parameters, see the GDDM Programming Guide manual and the GDDM Reference.

Note:

You can call IBM i Graphics using the CALL operation. You can also use CALLP if you define a prototype for the routine and specify the EXTPGM keyword on the prototype. You cannot use the CALLB operation. You cannot pass Date, Time, Timestamp, or Graphic fields to GDDM, nor can you pass pointers to it.

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